[FEATURE]:Ctrl+Z cannot undo input messages

[jimmysuncpt]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

When I pressed Ctrl+Z, the CLI exited. I hope it will undo my input messages instead of closing.

• OS：Ubuntu 24.04.4

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• input_undo and input_redo keybindings do not work #16282: input_undo and input_redo keybindings do not work — directly related, covers the same undo-in-input-box functionality
• no way to recover from an accidental ctrl+z in windows #16050: no way to recover from an accidental ctrl+z in windows — same Ctrl+Z behavior causing CLI to exit

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For keybind-related issues, please also check our pinned keybinds documentation: #4997

[Vishal2002]

I think there is /undo command in TUI

[Vishal2002]

@ariane-emory Would you accept a PR that adds Ctrl+_ as an undo keybind in the textarea,
following the emacs convention you mentioned? Happy to implement it if so.

[ariane-emory]

@Vishal2002 I'd be content with that, but do bear in mind that it's ultimately it's up to the team what they'd like to accept.

[HtetOoWaiYan]

You can actually do that in opencode tui config in ~/.config/opencode/tui.json.

{
  "$schema": "https://opencode.ai/tui.json",
  "scroll_speed": 3,
  "scroll_acceleration": {
    "enabled": true
  },
  "diff_style": "auto",
  "keybinds": {
    "terminal_suspend": "none",
    "input_undo": "ctrl+z,ctrl+-,super+z"
  }
}

[Karvy-Singh]

I made a small wrapper for opencode called opencodezy, this wrapper runs opencode inside a child PTY and translates:

Ctrl+Z -> Ctrl+- (undo)

Ctrl+Y -> Ctrl+. (redo)

One can use ctrl+z for undo now without the session suspending.

Everything else is forwarded normally.

Repo: https://github.com/Karvy-Singh/opencodezy

Open to suggestions, improvements, bug reports, or any shortcomings you notice.